The blonde
 

A blonde desperately needed some money, so she decided to kidnap someone. So she went to the park and she grabbed this kid.

Then she wrote a note saying, "If you ever want to see your child again, leave 10,000 dollars in a paper bag in the northwest corner of the park." then she signed it 'THE BLONDE' and told the kid to give it to his mom.

The next day she went to the northwest corner of the park and got the paper bag. It had the money in it and a note from the mother that said, "How could you do this to another blonde?"